Azo dyes



UNITEFD STA OF FRIEDRICHSHAGEN} NEAR BERLIN, G

LIN FABRIKATION, OF BERLIN RUDOLF HAUGWITZ,

r0 ACTIEN GESELLSCHAFT .ANI

No Drawing.

To all whom it may Be it known that specification.

The objects of my Application filed July 5, 1916.

concern: I Rtnoilr HAUGWITZ, a lei-many, residing Berl Germ

AZO DYES.

Specification of Letters Patent.

in, Germany,

Friedany, have 1nl Improvements following 1s a dyes derived from a diazo compound and an S-hydroxy-derivatl\e of qumolme. for 111- stance of S-hydroxyqu made by sultonating inolinesuli'onic acid S-hydroxyquinoline.

' As diam-compounds most adapted are those which are derived from aminoaryl-sultonic acids of the benzene series. ture is executed in the know The manufacn manner by coupling the components in an alkaline menprcpared are brownstruum. 1sh powders which The dyes thus dye woo 1 from aqueous solutions orange tints becoming fast to washlng and milling when treated with ehromic acid or chromates, yellow mium lakes belng formed.

ing agents the dyes are out limiting it the given, the parts being 19.5 parts of sodium 'anili aqueous solution means of parts of hydrochloric acid 0 are diazotized 111 an to brownish chro- By strong reduedestroyed. In order to illustrate my invention withfollowing example is by weight:

ne-3-sulfonate 12 B. and 7 partsof sodium nitrite. The diam-compound is then mixed with an aquets of 8-hydroxyquin- 30 parts of calcined ous solution of 22.5 par ohne-sulfomc acid and sodium carbonate.

Aft

dye is salted out and dried.

orange tints.

sium' bichromate a reddish yel obtained.

Having now I claim is,

1. The new dyes forming o to brownish chromium lakes a er combination the It dyes Wool After treatment with potaslow dyeing is described my invention what 11 Wool yellow nd being sul- Serial No. 107,675.

fonic acids of the azo-dyes wh TES PATENT OFFICE.

ERMANY, ASSIGNOR GERMANY.

Patented Feb. 7, 1922.

ich may be derived from a diazotized aromatic amine and S-hydroxyquinolin and correspond to the formula 2. The new dyes forming on wool yellow to brownish chromium lakes which may be derived from a d1azoaryl-sulfome acid and an S-hydroxy-derivatlve of quinohn and correspond to the formula:

where X means hydrogen or 3. The new dyes forming on to brownish chromium lakes derived from a diazoaryl-sul a substituent.

wool yellow which may be t'omc acid and 8-hydroxyquinolin-5-sulfon1c acid and correspond probably to the formula:

so n

4-. The new dye forming on wool a reddish yellow chromium lakewhich may be derived from diazo-benzene-3-sul.fonic acid and 8-hydr0xyqu1nolin-5-sulfomc acid and corresponds probably to the formula SOaH In testimony whereof I afiix my signature in presence of two witnesses. RUDOLF H 'Witnesses HENRY HARsnR, ALLEN F. JENNINGS.

AUGWITZ. 

